根据句意，用括号中所给词的适当形式填空。
Mike goes to see his grandparents _________(one) a week.
Exercise is        (health) for the mind and the body.
This flower is ____     (good) than that one.
Which city is _________ (beautiful),Beijing,Shanghai or Hangzhou?
His __________(eat) habits are pretty good, so he’s very healthy.